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Spidennis, You didn't use any other kind of underinsulation with it? Just the wool blanket? Very cool.

oh no, i had a pad and sb in there with me, but I was much too warm! I wanted to try shedding stuff to see what I can get away with, but wouldn't you know it, the weather got better, dang it! this is a tool in my bag of tricks that I'll be willing to use though when the time comes around again.

DuPont™ Tyvek® brand protective covers are made from high-density polyethylene (HDPE) in a proprietary manufacturing process that creates a unique balance of properties that are ideal for a protective cover.

DuPont™ Tyvek® brand protective covers are made from high-density polyethylene (HDPE) in a proprietary manufacturing process that creates a unique balance of properties that are ideal for a protective cover.

Sweat is not vapor. Breathable materials pass water vapor, not necessarily liquid water. DWR coated ripstop nylon is breathable, but liquid water pools on it.

thats my point you once you start sweating in them or on them you will be wet the liquid that gathers on the surface will form a vapor barrier

regardless in this application it would not work cause the fibers on a woolen blanket and very tough and would migrate thru tyvek anyway thats why most old wool comforters have cheese cloth inside it help contain it

I have a wool shirt with a Gore Windstopper lining. It is crazy warm. Warm, to the point that it is unwearable on all but the coldest of days.

A layer of Tyvek sewn to the outside of a wool blanket might prove surprising.

From the very beginning you illustrated my point a wool shirt with a lining is unwearable on all but the coldest days they takes away one of the two major advantages in wool its ability to thermo regulate your body temperature